Abstract
Cascade laser emission at 2.31 and 2.08 µm is observed in Tm3+,Ho3+:LiYF4 (YLF) at room temperature using a laser diode pump source. The laser emission at 2.31 µm is from the 3H4 → 3H5 transition in thulium, and the emission at 2.08 µm is from the 5I7→5I8 transition in holmium. The laser transition in holmium has been previously reported with laser diode pumping in another laser host yttrium aluminum garnet (YAG)1,2,3.
© 1987 Optical Society of America
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